How to concatenate strings in twig

Question

Anyone knows how to concatenate strings in twig  I want to do something like      concat  http      app request host

User · Answer

In this case  where you want to output plain text and a variable  you could do it like this   http      app request host      If you want to concatenate some variables  alessandro1997 s solution would be much better

User · Answer

Quick Answer  TL DR    Twig string concatenation may also be done with the format   filter   Detailed Answer  Context   Twig 2 x String building and concatenation   Problem   Scenario  DeveloperGailSim wishes to do string concatenation in Twig   Other answers in this thread already address the concat operator This answer focuses on the format filter which is more expressive    Solution   Alternative approach is to use the format filter The format filter works like the sprintf function in other programming languages The format filter may be less cumbersome than the   operator for more complex strings   Example00   example00 string concat bare         s s s   format  alpha   bravo   charlie       --- result --  alphabravocharlie      Example01   example01 string concat with intervening text        The  s in  s falls mainly on the  s   format  alpha   bravo   charlie       --- result --  The alpha in bravo falls mainly on the charlie            Example02   example02 string concat with numeric formatting follows the same syntax as sprintf in other languages        The  04d in  04d falls mainly on the  s   format 2 3  tree       --- result --  The 0002 in 0003 falls mainly on the tree               See also   http   twig sensiolabs org doc 2 x filters format html https   stackoverflow com tags printf info

User · Answer

This should work fine       http       app request host      To add a filter - like  trans  - in the same tag use        http       app request host    trans      As Adam Elsodaney points out  you can also use string interpolation  this does require double quoted strings       http     app request host

User · Answer

To mix strings  variables and translations I simply do the following          set add link          lt a class  btn btn-xs btn-icon-only          title       string to be translated  trans              href      path  acme myBundle link    link  link id         gt       lt  a gt             Despite everything being mixed up  it works like a charm

User · Answer

foo    bar  capitalize  join      As you can see this works with filters and functions without needing to use set on a seperate line

User · Answer

The operator you are looking for is Tilde      like Alessandro said  and here it is in the documentation         Converts all operands into strings and concatenates them      Hello       name          would return  assuming name is  John   Hello John    ndash   http   twig sensiolabs org doc templates html other-operators   And here is an example somewhere else in the docs      set greeting    Hello        set name    Fabien         greeting   name lower         Hello fabien        use parenthesis to change precedence        greeting   name  lower       hello fabien

User · Answer

The            -delimiter can also be used within strings    http      app request host

User · Answer

You can use   like    foo    inline string    bar fieldName     But you can also create your own concat function to use it like in your question     concat  http      app request host       In src AppBundle Twig AppExtension php   lt  php  namespace AppBundle Twig   class AppExtension extends  Twig Extension                    inheritdoc              public function getFunctions                 return               new  Twig SimpleFunction  concat     this   concat      is safe    gt    html                            public function concat                 return implode     func get args                            inheritdoc              public function getName                 return  app extension             In app config services yml   services      app twig extension          class  AppBundle Twig AppExtension         public  false         tags              -   name  twig extension

User · Answer

In Symfony you can use this for protocol and host      app request schemeAndHttpHost      Though  alessandro1997 gave a perfect answer about concatenation

User · Answer

Also a little known feature in Twig is string interpolation       http     app request host

User · Answer

Whenever you need to use a filter with a concatenated string  or a basic math operation  you should wrap it with    s  Eg         http       app request host    url encode

[syntax] How to concatenate strings in twig

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